Plymouth is located in north Iowa. Plymouth is between the Cerro Gordo, Mitchell, Worth county. Plymouth has 0.44 square miles of land area and has no water area. As of 2010-2014, the total Plymouth population is 398, which has shrunk 7.23% since 2000. The population growth rate is much lower than the state average rate of 5.19% and is much lower than the national average rate of 11.61%. Plymouth median household income is $49,167 in 2010-2014 and has grown by 52.01% since 2000. The income growth rate is much higher than the state average rate of 33.56% and is much higher than the national average rate of 27.36%. Plymouth median house value is $90,000 in 2010-2014 and has grown by 66.05% since 2000. The house value growth rate is higher than the state average rate of 53.09% and is higher than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Plymouth is much better than the state average in quality. The Plymouth area code is 641.